The XDJ series portable short-circuit grounding wire is used for short-circuit grounding on the equipment and lines under maintenance, with the purpose of discharging residual charges, preventing dangerous voltage and arc during incoming power, or induced voltage caused by the influence of adjacent live equipment and lines. Millions of workers may be electrocuted or severely burned. Therefore, it is necessary to choose the correct number of short-circuit grounding wires to be hung, the correct hanging location, and the correct use of short-circuit grounding wires according to safe working conditions. After taking these measures, the influence of dangerous voltage and arc can be avoided.